.screen{
    /* position: relative; */
}
.pixels {
    /* position: absolute; */
    /* top: -1px; */
    border: 1px solid black;
}
.pixels td {
    width: 32px;
    height: 32px;
    background-color: #42683b;
    /* border: 1px solid black; */
}
td.light {
    background-color: #fff;
}
td.dark {
    background-color: #333;
}